Estimation of age in fish is fundamental to know the growth rate and other biological parameters. Here is presented a first effort to use eye lens weight and diameter in order to determine age in Silurus glanis. Eyes were obtained from a sample of Silurus collected in Campotto lakes and dried lenses were then measured in weight and diameter with a precision balance and digital calliper. Correlation with an estimation of age based on the vertebral body was calculated. The best results came from the weight as the diameter produced a less informative curve. No significant differences between genders were detected.

Stima dell’età di Silurus glanis mediante peso del cristallino

SCARAVELLI, DINO;ZACCARONI, ANNALISA;MORDENTI, OLIVIERO
2010

Abstract

Estimation of age in fish is fundamental to know the growth rate and other biological parameters. Here is presented a first effort to use eye lens weight and diameter in order to determine age in Silurus glanis. Eyes were obtained from a sample of Silurus collected in Campotto lakes and dried lenses were then measured in weight and diameter with a precision balance and digital calliper. Correlation with an estimation of age based on the vertebral body was calculated. The best results came from the weight as the diameter produced a less informative curve. No significant differences between genders were detected.
D. SCARAVELLI; A. ZACCARONI; O. MORDENTI
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11585/91304
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